The double assault aims to contrast the hard left Opposition Leader’s record as a pacifist alongside his jumbo spending promises.

Mrs May is releasing a hard-hitting poster campaign as well as a dossier that claims Mr Corbyn has a £45billion black hole in his tax and spending plans.

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The PM has released this campaign poster

The poster’s slogan reads: “Corbyn: No Bombs for our Army, One big bombshell for your family”.

The 16 page dossier tallies up all the commitments Mr Corbyn has made as party boss or during his two leadership bids that he has not since discarded.

They range from cuts he has pledged to cancel – such as the benefits cap – to new spending promises – like renationalising the Royal Mail – and fresh tax hikes, including pushing corporation tax on all businesses back to 28%.

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By 2020, the grand total missing to make Mr Corbyn’s sums add up is £45bn, the Tories claim.

Brexit Secretary David Davis, who will unveil the new poster alongside Chancellor Philip Hammond this morning, said last night: “Jeremy Corbyn’s nonsensical and irresponsible ideas pose a grave risk to the future of Britain’s economy and the finances of every family in the country. His many, ill-thought through promises simply don’t stack up and could not be paid for.

“The damage this bombshell would do to the country’s finances if Corbyn’s coalition of chaos were given the keys to Downing Street would be disastrous.

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Theresa May has attacked Jeremy Corbyn with a poster and dossierCredit: EPA

Boris Johnson also renewed his assault on the Mr Corbyn yesterday, insisting he was “dangerous” as there is still a real risk Labour could win the election.

During a whistle-stop visit of the Black Country, the Foreign Secretary called on voters to ignore polls with runaway Tory leads.

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Boris Johnson also hit out at the Labour leaderCredit: Getty Images

Boris insisted: “We should not under any circumstances underestimate the possibility of Labour getting into power under a dangerous Jeremy Corbyn.

“People may well think that the risk of him becoming prime minister is not that great, but they have to understand that the severity of that risk is extreme.”

From today, Britain will no longer have any MPs for the next weeks as the 650 members of the Commons all become candidates, apart from the few dozen that are stepping down.

MINISTERS yesterday admitted defeat over delaying ­diesel tax hikes until after the election. They will not appeal against a High Court ruling ordering them to publish by May 9 their draft plans to cut toxic air by targeting diesel motors.